Re: [PATCH 0/2] skip tests that don't work with an external log

[Eryu Guan <guaneryu@gmail.com>]

On Tue, Jul 06, 2021 at 10:48:37AM -0700, Darrick J. Wong wrote:
> On Mon, Jul 05, 2021 at 12:03:05AM -0400, Theodore Ts'o wrote:
> > I recently tried running xfstests with an external log device, and
> > found a number of failures caused by the fact that we use dmflakey and
> > dmerror to take down a disk to simulate a power failure or a complete
> > hard disk failure.  But with an external log device, the tests don't
> > correctly simulate these scenarios, so skip them.
> 
> Counter-proposal: If I sent out my series to fix all that[1], would you
> review them?

Yeah, I was going to ask if xfs supports dmflakey tests with external
log dev. So Ted's proposal will break your work.

And if we want to disable dmflakey/dmerror tests with external log only
for ext4, I think we could do it in _require_dm_target() not in
_init_flakey(), something like:

_require_dm_target()
{
	local target=$1
	......

	case "$target" in
	flakey|error)
		if [ "$FSTYP" == "ext4" -o "$FSTYP" == "ext3" ] && _has_logdev; then
			_notrun "dmflakey/dmerror tests don't work with an external log device for $FSTYP"
		fi
		;;
	*)
		;;
	esac
	......
}

Then generic/475 doesn't need any update.

Thanks,
Eryu

> 
> --D
> 
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfstests-dev.git/log/?h=dmerror-on-rt-devices
> 
> > 
> > With these patches, testing with ext4 using an external log is passing
> > almost all of the auto group tests, with the exception of ext4/028
> > (which appears to be a genuine ext4 fsmap bug not handling external
> > log devices correctly).
> > 
> > Theodore Ts'o (2):
> >   dmflakey: don't run dmflakey tests with an external log device
> >   generic/475: skip test when using an external log device
> > 
> >  common/dmflakey   | 4 ++++
> >  tests/generic/475 | 4 ++++
> >  2 files changed, 8 insertions(+)
> > 
> > -- 
> > 2.31.0
> >